Improvements in Reservoir Construction, Operation and Maintenance

Contents

1. Implementation and operation of UK reservoir legislation

Reservoir safety – are things improving? A HUGHES 3

Development of the requirements for flood plans under the Reservoirs Act 197S (as amended) A J BROWN and J D GOSDEN 13

A new incident reporting system for UK dams A L WARREN and IM HOPE 26

Reservoir hazard analysis and flood mapping for contingency planning J C ACKERS, R V PETHER and F R TARRANT 37

Impact of the Controlled Activities Regulations on dam construction, maintenance and operation in Scotland C W BERRY and K M H BARR 47

2. Hydraulics and hydrology

Improved reservoir level assessment through the mathematical modeling of weir crest coefficients P MASON, K DEMPSTER and J POWELL 61

Yuvacik Dam: improvements to dam operation utilizing an integrated atmospheric-hydrological model T GEZGIN, A UNAL SORMAN, A SENSOY and A ARDA SORMAN 72

Water management at Dinorwig pumped-storage power station MI BAILES and O P WILLIAMS 84

Boscastle and North Cornwall floods, August 2004: implications for dam engineers R BETTESS and V BAIN 94

Reconstruction of the Znojmo Dam – practical application of hydraulic research V STARA, M SPANO and J SULC 106

3. Internal erosion

Identifying leakage paths in earthen embankments V KOFOED, J MONTGOMERY and K GARDINER 119

Is internal erosion dectable? J DORNSTADTER, D DUTTON, A FABRITIUS and P HEIDINGER 129

Leakage investigations at Lower Carno Dam A ROWLAND and A POWELL 144

Comparison of methods used to determine the probability of failure due to internal erosion in embankment dams M EDDLESTON and I C CARTER 154

In search of the perfect geotextile/geocomposite filter for retro-fitting old embankment dams M EDDLESTON, H TAYLOR, N ROBINSON and A BINNS 165

4. Planning and design

Wave surcharge on long narrow reservoirs – a reality check A KIRBY and K DEMPSTER 183

The Kidder Water Scheme: the last of its kind? C S MCCULLOCH 196

Glendoe hydroelectric scheme, optimisation and dam selection M SEATON and J SAWYER 211

Assiut Barrage, to rehabilitate or to rebuild T J F HILL 224

5. Risk assessment and dam break analysis

Preliminary feedback on the Interim Guide to Quantitative Risk Assessment for UK reservoirs, 2004 A J BROWN and J D GOSDEN 239

Quantitative Risk Assessment in practice J D GOSDEN and D DUTTON 251

FLOODsite (Integrated Flood Risk Analysis and Management Methodologies) – research relevant to the dams industry? M W MORRIS and P G SAMUELS 261

Numerical tools for dam break risk assessment: validation and application to a larges complex of dams B J DEWALS, S ERPICUM, P ARCHAMBEAU, S DETREMBLEUR and M PIROTTON 271

Failure impact assessment of a mine site flood levee in Australia R PETHER 283

6. Refurbishment, construction and maintenance

Refurbishing and upgrading old spillway gate installations J LEWIN, G M BALLARD and P TO 295

Investigation and rehabilitation of Chardara Dam spillway J H MELDRUM 304

Application of modern grouting technology to remedial works on dams A K HUGHES and C T KETTLE 315

Emergency underwater rehabilitation of the Poti Main Diversion Weir, Georgia L SPASIC-GRIL 330

Barrow Compensation Reservoir grouting works A WARREN, C HUNT and M ATYEO 345

Reservoir safety and refurbishment works at Severn Trent Water’s Howden, Derwent and Linacre Reservoirs S A ROBERTSON 355

The management of siltation at Hillsborough Dam, Tobago D A BRUGGEMANN and J D GOSDEN 368

Desiccation assessment in puddle clay cores A KILBY and A RIDLEY 381

The failure of the Mostiste embankment dam J RlHA and J SVANCARA 391

Construction of three RCC dams forming part of the Ghatghar pumped storage project in India V C SHELKE, M R H DUNSTAN, J L HINKS and T ZELENKA 404

Lightweight fill in dam remediation – a case study KMHBARR 412

The influence of inspection and monitoring on the phased construction of the Barragem de Cerro do Lobo

M CAMBRIDGE and M OLIVEIRA TOSCANO 419